Script changes and reshoots ordered for Brad's zombie project

Brad Pitt's 'World War Z' is set to undergo a script rewrite and extensive reshoots even though filming has ended.

The actor - who is also one of the producers - shot the post-apocalyptic horror film in various locations around Europe last year but 'Prometheus' screenwriter Damon Lindelof has been brought on board to fix some problems with the first cut.